Ruddlesden−Popper-Structured (Pr0.9La0.1)2(Ni0.8Cu0.2)O4+δ: An Effective Oxygen Electrode Material for Proton-Conducting Solid Oxide Electrolysis Cells
Mineral Materials and Advanced Energy Materials > 8. New Energy Materials
Abstract Accepted
云峰 田 / 中国矿业大学
Proton-conducting solid oxide electrolysis cells (H-SOECs) have attracted lots of attention due to high efficiency, energy saving and environmental friendly. The ideal H-SOEC oxygen electrode materials are triple conducting oxide with mixing proton (H+), oxygen ion (O2-) and electron (e-) conductivity. Herein, the triple conductive oxide Pr2NiO4+δ (PNO)-based perovskite (Pr0.9La0.1)2(Ni0.8Cu0.2)O4+δ (PLNCu) is chosen as the oxygen electrode of H-SOEC with impressive electrochemical performance. Its crystal structure, physicochemical property and cell performance are discussed in detail. The thermal expansion coefficient of the PLNCu sample is 13.78×10-6 K-1, and the electrical conductivity is 258 S cm-1 at 450 °C. Moreover, the polarization resistance of the single cell is as low as 0.056 Ω cm2 and the current density at 1.3 V can reach 1.61 A cm-2 at 750 °C, which shows the good electrochemical performance. 100 h of long-term testing also shows that the cell has good performance and structure stability. Therefore, this work highlights a novel oxygen electrode material (Pr0.9La0.1)2(Ni0.8Cu0.2)O4+δ for proton-conducting solid oxide electrolysis cells.